Reset the check engine light on a 1999 Altima?

To reset the check engine light on a 1999 Nissan Altima, first, use an OBD-II scanner to read and clear any stored trouble codes. Alternatively, you can disconnect the car's battery by removing the negative terminal for about 15 minutes, then reconnect it. However, it's essential to address any underlying issues that triggered the light before resetting it to avoid future problems. Always consult a mechanic if you're unsure about the cause of the warning light.